The patient should support his/her cheeks with the hands to prevent pressure changes induced by the mouth. This should
be done without supporting the elbows or elevating the shoulders.
Recorded pressure changes should be within the calibrated pressure range of each transducer. The entire tracing should
be visible. Pressure changes that are too large or too small may yield erroneous results.
Thermal equilibrium should be evident; tracings should not drift on the display or recording.
The panting frequency is approximately 1 Hz if the filter is not applied. Frequency should be held constant for within -
testing session comparisons (ie, pre- and post-bronchodilator testing) and serial testing.
Raw and sGaw maneuvers may be considered acceptable if the open-shutter panting maneuver shows a relatively closed
loop, particularly in the range of +0.5 to -0.5 L/s.